SDSS
DR14
Finding Chart Tool

Finding Chart (ra, dec, scale, height, width, opt, query)

returns a JPEG image centered on (ra,dec), of size (height x width)
where the image is scaled to an arbitrary scale (scale). In SDSS the
default scale is 0.396127 arcsec/pix. Various drawing options can be specified (opt).
Use mark query to select objects of special interest.

This option will draw a triangle on top of objects selected by a marking string.
Objects must be inside the field of view of the image to be displayed.
The format of the string can be from the following choices:

List of objects. A header with RA and DEC columns must be included.
Columns must be separated by tabs, spaces, commas or semicolons.
The list may contain as many columns as wished.

restricts marks to objects with Band BETWEEN low_mag AND high_mag
Band 'A' will mark all objects within the specified magnitude range in any band (ORs composition).

Examples:

S

S R (0.0, 23.5)

G A (20, 30)

Drawing options:

The characters present will select the corresponding option
from the list below. Characters not in the list are ignored.

G

Grid

Draw a N-S E-W grid through the center

L

Label

Draw the name, scale, ra, and dec on image

P

PhotoObj

Draw a small cicle around each primary photoObj

S

SpecObj

Draw a small square around each specObj

O

Outline

Draw the outline of each photoObj

B

Bounding Box

Draw the bounding box of each photoObj

F

Fields

Draw the outline of each field

M

Masks

Draw the outline of each mask considered to be important

Q

Plates

Draw the outline of each plate

I

Invert

Invert the image (B on W)

Direct access for web pages:

This application is based on an underlying web service, ImgCutout.asmx which
can be called in many different ways, using the SOAP protocol, or just using the
standard HTTP GET and PUT interfaces. The formal description is contained in
the WSDL, Web Service Description
Language document.

The getjpeg service can be directly called from any web page through the HTTP
GET protocol. In order to build a dynamic cutout into your own web page, insert
the following example. Naturally, replace the parameter values with your own.